Method of preparing tinned sheet-iron boxes, &amp;c., for detinning.



H. GOLDSOHMIDT.

METHOD OF PREPARING TINNED SHEET IRON BOXES, &C., FOR DETINNING.APPLIUATIQN FILED JUNE 30, 1911 1953,908 Patented Feb. 18, 1913 2SHEETS-SHEET 1.

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H. GOLDSGHMIDT. METHOD OF PREPARING TINNED SHEET IRON BOXES, 610., FORDETINNING. APPLICATION FILED .TUN1J30. 1911.

1,@58,98 Patented Feb. 18, 1913 2 SHEETS-SHEET 2.

UNITED STATES PATENT ()FFIQE.

HANS GOLDSCHMIIDT, or nssnn-on-rnn-nunn, GERMANY, assronon T0GOLDSCHMID'I. DETINNING COMPANY, or new YORK, N. Y., A CORPORATION onNEW JERSEY.

METHOD OF PREPARING TINNED SHEET-IRON BOXES, 800., FOR DETINNING.

Specification ,of Letters Patent.

Patented Feb. 18,1913.

Original application filed January 22, 1907, Serial No. 353,536. Dividedand this application filed June 30,

1911. Serial No. 636,152.

To all whom it may concern Be it known that I, HANS GoLnsoHMID'r, doctorof chemical science, asubject of the King. of Prussia, German Emperor,and resident of Essen-on-the-Ruhr, in the German Empire, have inventednew and useful Improvements in Methods of Preparing Tinned Sheet-IronBoxes, &c., for Detinning, of which the following is a specification. a

My present invention is a division of an application filed by me January22, 1907, Serial No. 353,536, and'is in the nature of an improvementupon that shown, described and claimed in Letters Patent No. 804,530,granted to me November 14, 1905, which patent relates to a'sim-ilarmethod of preparing sheet-iron boxes, etc., for detinning. In practiceit has been found that when a method and apparatus such as set forth insaid prior patent are used, only a certain size of boxes or othermaterial can be properly treated and fed in a regular manner between therollers by which the boxes are to be compressed, the size of the boxes,etc,

being proportionate to the width of the pass between the rollers. Whenboxes of too large a size are fed to the rollers they are not properlypresented and are notfed at once into the pass between the rollers, butroll about in front of the pass, sometimes for a considerable length oftime, before they are caught and positively fed into the pass by theprojecting perforators with which the rollers are equipped. Constantattention on the part of the workman in charge of the machine isrequired when boxes of excessive size are fed into a machine of the typeillustrated in my prior patent.

The principal object of my present invention is to improve the methoddisclosed. in said prior patent for preparing boxes for detinning, andin doing so I have found it necessary to divide the compressing functioninto two distinct parts, and I preferably divide each of the two mainfunctions, that is, both the compressing and perforating, into twodistinct parts. To divide the compressing function into two mainpartsIprovide an additional pair of compressing rollers, which operateuponthe tinned boxes,

etc., and compress the same partially before such partially compressedboxes are fed to the second pair of rollers, where they are posed belowthe first pair and will receive the partically compressed tin-boxes,etc., directly therefrom. The two pairs of rollers may be rotated'by anysuitable means, as for example, by a train of gearing-driven from asuitable source of power.

The same method should be capable of treating both large and small sizesof boxes,

' and in order to permit this the width of the pass between the firstpair of rollers should be capable of adjustment to accommodate boxes ofdifferent sizes. This adjustment may be obtained by mounting oneDf-therollers of the firstpair in such a manner that it may be adjustedtoward and from the other and securely held in placein any desired,adjusted position, this adjustment being usually in a horizontal plane.In this way the pass between the first or upper pair of rollers intowhich boxes are fed in any suitable manner, is increased or decreased inwidth to correspond to the size of the boxes to be compressed, and thusthe shifting androlling about of the boxes at the entrance of the .passis prevented, and each box is properly caught between the rollers andcompressed as soon as it is presented at the .pass. After the firstpartial compression, and also partial perforation, when the rollers ofthe first pair are provided with perforators, the flattened partiallycompressed-and perforated boxes are delivered to the lower pair ofrollers by which said boxes are fully compressed and completelvperforated. Suitable means are provided for scrapin oil the com ressedand perforated boxes rom the rol ers of each pair and assuring thedelivery of the partially compressed boxes directly to the passbetweenthe rollers-of the lower pair.

In the drawings which illustrate an apparatussuitable for carrying outthis method of preparing'boxes, cans, etc., fordetinning, Figure l is afront elevation, partly in transverse section, the sect-ion being takenin the line 0-4), Fig. 2, with the motor removed;

Fig. 2 'is a side elevation and longitudinal section of the same, thesection being taken in line A-B, Fig. 1; Figs. 3 and dare details of aspecific type of perforator preferably employed for puncturingthe'tinned boxes, etc., the perforator being shown full size.

Referring now to the drawings, 1 repre' sents a source of power of anysuitable kind, an electric motor being here illustrated,- and 2 adriving pulley secured to the shaft of the motor, from which pulleymovement is trans mitted by a belt 3 to a driven pulley, such as 4, hereshown as of large size. The rotary movement of this driven pulleyv maybe transmitted by means of a train of gearing, such as 5, to thetwopairs of rollers which operate upon the material. The rollers of thefirst or upper pair are designated respectively by 6 and 7, and those ofthe secs 0nd and lower pair are designated respec tively by 8 and 9. Thecomparative sizes of therollers of the first and second pairs should besuch that the material will be operated upon at the first stage of theoperation by surfaces traveling at a slower speed than during thesecondstage of the operation. For this reason the rollers of the firstor upper pair are of larger diameter than those of the lower pair, andthe surfaces thereof move at a lower circumferential speed than thesurfaces of the rollers of the lower pair.

The two pairs of rollers may be mounted in aframe structure of anysuitable type, such for example as that illustrated at 10. The rollersthemselves are intended not only to compress the material but also toperforate the same, and bothlpairs of rollers are preferably providedwith suitable perforators for puncturing the boxes. I prefer to use atype of perforator such as shown in detail in F igs. 3 and 4, the bodyportion of such perforator being pyramidal, as shown rollers. v readilypuncture the boxes and other mataat 12. These perforators roject fromthe surfaces of the rollers and cover substantially the whole of thesurface of each roller to whichthey are applied. The perforators willusually be arrangedin regular rows both lengthwise and circumferentiallyof the Perforators of this construction reaaeos carried by the lowerpair of rollers and are also disposed somewhat farther apart than thoseof the lower rollers. The object of this is to effect a coarsepreliminary puncturing of the material as well as a partial compressingby the rollers ofthe upper pair, after which the complete compression ofthe materialwill be effected by the rollers of the lower pair, and atthe same time the per forators carried by the lower rollers willthoroughly puncture the boxes, etc., at a larger number of points thanthe perforators of the upper rollers. Thus when the treatmentis completethe material will be in such a condition that the chemicals used in thesubsequentdetinning process will have free access to all parts of suchmaterial.

An important feature of the apparatus used in carrying out this methodrelates to the adjustment ofv the Width of the pass between the firstpair of rollers. The adjustment of this pass is in this case eflected byshifting the roller 6 to any oneof a number of positions horizontallyrelatively to the cooperating roller 7 This roller 6 is so mounted thatit can be shifted readily horizontally .on the upper frame-piece of theframe 10.

The upper frame-piece is here shown as having a series of holes 14passing therethrough, through which bolts, such as 13, carried'by thebearing 0r pillow-block for the shaft of the roller 6 may pass and besecured in place by the usual nuts. Sets of o enings l lare shown ateach side of the sha' t supported by such pillow-block, in order thatthe pillowbloek may be bolted down securely at both sides thereof. Asuilicient number of holes should be provided to permit the adjustmentof the roller 6 to the necessary positions for handling all thedifferent sizes of boxes intended to be compressed by the machine. It isobvious, of course, that'other means may be employed for adjusting theposition of the roller 6 with respect to the roller 7 and varying thewidth of the pass between said rollers.

Any suitable provision may be made in the power transmitting mechanismfor permit ting of the described adjustment of the roller 6 relativelyto the roller 7. For instance, the depth of the teeth of the gear wheelsshown is such as to maintain an operative mesh while permitting of acertain limited adj stment of the said rollers, while any additionaladjustment of the latter might be provided by substituting gear wheelsof different and desired diameters.

in practice the boxes to be compressed and perforated are delivered tothe machine from above between the upper rollers 6 and Y, the directionof feed being indicated by the arrow 11 in Fig. 2. After the boxes arecaught by the sharp points of the perforators carried by the upperrollers. 6 and 7 these boxes will be fed positively into the passbetween said rollers and partially compressed, at the same time beingperforated throughout their area by -the coarse perforators carried bysaid rollers. After being thus partially compressed and perforated, someof them will fall in the direction indicated by the arrow 18 between oronto the rollers of the lower pair and will be caught by the rotatingperforators carried by such rollers; while some of the boxes sopartially compressed will cling to the perforators of the upper rollersand will be carried along with such rollers in their rotation until theyare near or beyond the vertical planes passing through the axes of theupper rollers, when they must positively be removed from the perforatorsof the upper rollers in order to prevent them from being carried back tothe upper side of the pass between said rollers. Such boxes as cling tosaid perforators may be removed therefrom by suitable scrapers, such asthe plates 15 arranged substantially tangentially to the rollers andextending the whole length of the same. These scrapers are fastened tothe upper portion of the framework in any suitable manner, andpreferably have V-shaped tooth-spaces sub stantially complementary insize and shape to the V-sha-ped or pyramidal perforators 12 of the upperrollers, and lying respectively in the planes of rotation of suchpyramidal perforators carried by the upper rollers. These scrapers 15scrape off the compressed and paitially perforated boxes clinging to theperforators as such perforators with the boxes clinging thereto, comeadjacent to the scrapers, and cause such boxes to drop upon suitableguide-walls, such as 16, attached to the scrapers l5 and to the upperpart of the framework, as for example by means of channel -irons 17.These slanting walls serve as guides to direct the falling par-,

tially compressed end perforated boxes to the entrance of the passbetween the lower rollers, at the arrow 18, between which rollers theboxes are fully compressed and perforated at a greater number of pointsin their surfaces by the finer perforators carried by the lower rollers.After being thus fully compressed and perforated the boxes, etc., leavethe pass bet-ween the lower rollers and fall into a suitable receptacle(not shown) provided for the purpose. The.

lower rollers should also be provided with suitable means for removingthe boxes which may cling to the perforators carried thereby. The meansemployed may be scrapers 20'similar to those shown at 15 and operatingin the same manner, but having finer, that is, more closely spaced andsmaller, tooth-spaces lying in the planes of rotation of the respectivepyramidal perforators carried by the lower rollers.

lVhat I claim is 1. A method of preparing tinned boxes and the like fordetinning, consisting in first partially compressing and perforatingsaid boxes, and then further compressing the same.

2. A method of preparing tinned boxes and the like for detinning,consisting in first partially compressing and perforating saidboxes, andthen further compressing and perforating the same. 7

3. A method of preparing tinned boxes and the like for detinning,consisting in first partially compressing and coarsely perforatingtinned'boxes, and then further compressing and finely perforating thesame.

v 4. A method of, preparing tinned boxes and the like for detinning,consisting infirst partially compressing and perforating said boxes, andsimultaneously feeding the same, and then further compressing andperforating said boxes, and simultaneously feeding the same;

5. A method of preparing tinned boxes and the like for detinning,consisting in first partially rolling and perforating tinned boxes, andthen further rolling and perforating the same.

6. A method of-preparing tinned boxes and the like for detinning,consisting in first partially rolling and simultaneously coarselyperforating said boxes, and then further rolling and simultaneouslyfinely perforating the same. I

7. A method of preparing tinned boxes and the like for detinning,consisting in first partially rolling and perforating said boxes, andsimultaneously feeding the same, and then further rolling andperforating said boxes, and simultaneously feeding the same.

8. A method of preparing tinned boxes and the like for detinning,consisting in first partially compressing said boxes and then furthercompressing and simultaneously perforating the same.

HANS GOLDSCHMIDT. L. 8.

Witnesses:

CHAS. J. WRIGHT, ALFRED HINKEL.

